[R] Quadratcount() plotting in R spatstat

[beamer]

Hello,

I am trying to plot a quadratcount object over a ppp object in the spatstat
package. I ultimately want to get something like this 
http://bg9.imslab.co.jp/Rhelp/R-2.4.0/src/library/spatstat/man/images/big_quadratcount_001.png
http://bg9.imslab.co.jp/Rhelp/R-2.4.0/src/library/spatstat/man/images/big_quadratcount_001.png


See 
http://66.102.9.104/search?q=cache:zK2o-grKXgEJ:bg9.imslab.co.jp/Rhelp/R-2.4.0/src/library/spatstat/man/quadratcount.html+quadratcount&hl=en&ct=clnk&cd=2&client=firefox-a
here , for example code.

When I plot the quadratcount output (a table) it plots a mosaic graph over
the points (try this line for instance plot(Titanic, main ="plot(Titanic,
main= *)")   ), not the quads I want.

I'd appreciate any idea on how I can get the quadratcount to plot correctly.

Thanks
John
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